Introduction to Radiology

Radiology is a field of medicine that use _______ techniques for diagnosis and treatments.

Ionizing radiations are radiations that have enough energy to _____ atoms.

Which of the following are ionizing radiations?

• X-ray

• Gamma ray

• Ultrasound

• Magnetic

The following diagnostic equipments use ionizing radiation, except

• CT scan

• Fluoroscopy

• Echocardiograph

• MRI

The following diagnostic equipments use X-ray, except

• CT scan

• Fluoroscopy

• Mammography

• Gamma camera

Which one pose more risks?

• Ionizing radiations

• Non-ionizing radiations

If the energy of radiation is high, its frequency is

• low

• high

The radiation exposure cannot be controlled by the

• exposure time

• distance from the source

• shielding

• price of the equipment

If the distance from the radiation source is doubled, the resulting radiation exposure will be ______

• reduced to 50% of the original exposure

• reduced to 25% of the original exposure

• increased by 50% of the original exposure

• increased by 25% of the original exposure

What material is usually used to create a shielding for radiation in hospital?

• Lead

• Aluminium

• Carbon fiber

• Glass